Type-writing machine.



W. A. LORENZ.

TYPE WRITING MACHINE.

APPLICATION FILED SEPT. 11, 1905. RENEWED JUNE 21,1910

Patented Dec. 15, 1914.

2 SHEETS SHEET 1.

WIT/V5885 a) &.HVV 11/701? 60 ATTORNEYS W. A. LORENZ.

TYPE WRITING MACHINE.

APPLICATION FILED SEPT. 11. 19051 RENEWED JUNE 21, 1910.

1,120,726. Patented Dec. 15, 1914.

2 SHEETS-SHEET 2.

WITNESSES. //VVE 70/? stares a ENT onion.

WILLIAM. A. LoitENz, or Henrronn, CONNECTICUT, ASSIGNOR, BY MESNE ASSIGN- smarts, TO THE NoIsEL ss TYPEWRITER COMPANY, or MIDDLE'IOWN, common- CUI', A oonros'ra'rron or CQNNECTICUT.

Titian-WRITIN MACHINE.

maize.

Specification of Letters Patent.

Patented Dec. 15, 1914.

Application filed September 11, 1905, Serial No. 277,916. Renewed June 21. 1910. Serial No. 568,169.

Toqdlxwi om it may concern:

Be i known that 1, WILLIAM A. Lonanz, residing at Hartford, in the county of Hartford and $.tate of Connecticut, have invented certain, new and useful Improvements in Type-\Vriting Machines, of whichthe. following isva full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to typewrltmg machines and the like and, while capable of employment in a variety of relations in machines of other types, it is especially adapted for use in those known as silent typewriters v It has for a broad object the provis onof mechanism designed to produce a machine which will operate substantially without noise.

Another object is to prov de means adapted to arrest the motion of thevarious moving parts of a typewritmg machine 111 such a manner as to practically eliminate the noise usually incident to such operations.

More especially, the object of my present invention is to produce a stop for the key levers in a typewriting.machine of such a nature as to eliminate concussion or impact during the arresting of their movements, thus insuring a silent operation.

Other objects will be in part obvious and in part pointed out hereinafter.

The invention, accordingly, consists in the features of construction, combinations of elements and arrangement of parts which willbe exemplified in the mechanism hereinafter described and the scope of the application .of which will be indicated in the following claims In thehccompanying drawings, wherein are illustrated several of the various possible embodiments of my invention, Figure l is an elevation of. the same. Fig. 2 is a similar view showing the parts in a different position Fig. 3 is an elevation of another embodiment of the same. Fig. el is a similar view of the mechanism illustrated in Fig. 3 showin the parts in a different position F 51s an elevation of another embodiment of the same. Fig. (i is a similar view of the mechanism illustrated in Fig. 5 showing the parts in a different position. Fig. 7 is an elevation of still another embodiment of the same. Fig. 8 is a similar view of the mechanism illustrated in Fig. 7 showing the parts in a different position.

Similar reference characters refer to similar parts throughout the several views of the drawings.

Preliminary to a description of the more specific features of my invention and in order that the general objects thereof may be more easily understood, it may be here noted that in the production of a typewriting machine which will operate in all respects without noise, it is essential to provide suitable mechanism adapted silently to arrest the motion of the several movable parts of the machine. As tending toward that end, therefore, I have found it desirable to provide means adapted to arrest the movements of the key levers without impact or concussion, thereby insuring a substantially silent operation. The above and other advantages are secured in constructions of the nature of that hereinafter described.

Referring now to the drawings and particularly Figs. 1 and 2, there is shown at l a key lever suitably journalcd upon rod 2 positioned in the frame of the machine, which key lever is maintained in its upward position against a cushioned stop 3 by means of spring & connected to the key lever 1 at 5 and. to a fixed part of the machine. Key leverl is provided at its lower extremity with a, curved portion 6 preferably cut away, as at I, the urpose of which will be apparent hereinafter, and to said curved portion 6 the end 8 of a fiat spring 9 is attached, as by means 1Q, the opposite end thereof having a pivotal connection at 11 with an oscillating arm 12 pivoted in turn to a fixed portion ofthe machine at 13.

lathe operation of the above described embodiment which should be largely obvious, it will he understood that during the stroke of the key lever from its norma po sition, as shown in Fig, .1, to the position shown in Fig. 2, spring 9 is gradually brought into Contact or progresslvelly en gaged with the curved portion 6, osci ing arm 12 serving to carry the end of spring 9 toward its point of fastening by reason of the lessening of the distance between the ends of spring 9, due to its assuming a curved form.

The embodiment shown in Figs. 3 and d difiers slightly from that above described in that spring 9 rests upon a fixed pin or support 14, the operation being substantially the same as that above described, spring 9 sliding slightly along the surface of said pin or support 14 during its downward stroke.

Referring now to Figs. 5 and 6, I have, in this instance, bent the end of spring 9 as at 15 and provided a stop 16 fixed to the frame of the machine, in which is provided a slight depression 17, adapted to receive and support the free end of spring 9. During the depression of key lever 1, spring 9 bending slightly at 15, as shown in Fig. 6, compensates for the engagement of spring 9 with the curved portion 6.

As shown in Figs. 7 and 8,, I have provided a fixed bar or stop 18 having a curved periphery 19 to which is attached by suitable means, as screw :20, a fiat spring 21. The key lever 1 is, in this instance, provided with a depending projection 22 adapted to rest upon the free end of spring 21 and during the depression of key lever 1, spring 21 will be brought gradually into contact or progressively engaged with the curved periphery 19 of fixed stop 18, the movement thereof being arrested when the position shown in Fig. 8 is reached.

It will be noted that in each of the embodiments illustrated in Figs. 1 to 6 inclusive, I have so constructed the curved portion with which spring 9 is adapted to be progressively engaged or bent about that" the portion of said spring in engagement with the stop will fall without the end of said curved portion. By this arrangement, a slight elasticity is given the key lever 1, by reason of the short extent of spring 9 between the end of the cut away portion of curved portion 6 of key lever 1 and the fixed stop. It will be seen that this elasticity or springiness, may be reduced to a minimum by a lessening of the distance between the fixed stop and the end of curved portion, or

the same may be eliminated entirely by arrangingthe fixed stop directly under the outer. extremity of curved portion 6.

In Figs. 7 and 8 the results next above described may be effected, as will be apparent, by locating the depend ng portion 22 of key lever 1 nearer to or directly over the extremity of fixed stop 18. I

It will be further noted that by a gradual lessening of the effective length of springs 9 or21 in the stroke of the key lever to impression a constantly increasing resistance is afforded during such stroke, thus serving to gradually arrest the movement thereof, and moreover, it will be apparent that in all the embodiments herein shown and described, spring 9 or 21 assist in the returning of the key levers to their normal position under the influence of springs 4.

It will, accordingly, appear that I have provided mechanism well adapted to attain the several objects of my invention and which is, moreover, characterized by simplicity of structure and efiiciency of action, as the stroke of the key levers is yieldingly and yet positively arrested without impact or concussion and the production of noise is thereby prevented.

While I have shown my invention as applied to key levers, it should be obvious that it is well adapted to be applied to other moving parts of a typewriting machine, and I do not wish to be understood as limiting myself to such employment, nor even to its use in machines of the type described, as many of the features are capable of use in similar relations in machines of other types, although of peculiar value in the relation shown.

Having described my invention, what I claim as new and desire to secure by Letters Patent is 1. In a typewriting machine, in combination, a movable member, a fixed stop, and a resilient body interposed therebetween, said resilient body being so arranged with respect to said movable member and said fixed stop as to have its surface progressively engaged with the surface of one of the same during a movement of said movable member toward said fixed stop.

2. In a typewriting machine, in combination, a movable member, means adapted to return said member to normal position, a

fixed stop, and a resilient body so arranged interposed between saidv movable member and said stop, the arrangement of said resilient body with respect tosaid movable member and said fixed stop being such that during a movement of the former in the di rection of the latter, the efiective length of said resilient body will be gradually reduced.

1. In a typewriting machine, in combination, a movable member, a fixed member, and a fiat resilient body interposed therebetween, said resilient body being so arranged names with respect to said aforementioned members as to be progressively engaged with the surface of one of said members and remain in engagement therewitlrduring a movement of the former member toward the latter member.

In a typewriting machine, in combination, a movable member, a fixed member, one of said members being provided with a curved surface, and a resilient body interposed between said members, said resilient body being so arranged with respect to said members that during a movement of the former toward the latter said resilient body will have its surface progressively engaged with said curved surface.

6. In a typewriting machine, in combination, a movable member. a fixed member, one of said members bein provided with a curved surface and a resilient body'so arranged with respect to said members that during a movement of the former toward the latter, said resilient body will have its surface brought radually into contact with said curved sur ace, thereby reducing the effective length of said resilient body, such operation effecting a constantlyincreasing resistance to the movement of said firstmentioned member.

7. In a typewriting machine, in combination, a movable member, a fixed member, one of said members bein provided with a curved surface, and a resilient body attached to one of said members, said resilient body being so arranged with respect to said mem bers that a movement of the former toward the latter will effect a progressive engagement of the surface of said resilient body with said curved surface.

8. In a typewriting machine, in combination, a movable member, a fixed member, one of said members being provided with a curved surface, and a resilient body attached to one of said members and having a frictional connection vith the other of said members, said resilient body being so arranged with respect to said members that a movement of the former toward the latter will effect a progressive engagement of the surfaceof said resilient body with said curved surface.

9. In a typewriting machine, in combination, a movable member, a fixed member, one of said members being provided with a curved portion. and a flat resilient body attached to and arranged adjacent said curved portion and adapted during a move ment of said first-mentioned member toward said second-mentioned member to be pro gressively engaged with said curved portion.

10. In a typewriting machine, in combination, a movable member, a fixed member, one of said members being provided with a curved portion, and a resilient body of greater length than said curved portion connected to one of said members, said resilient body being so arranged-with respect to said members that a movement of the former t ward the latter will effect a progressive engagement of said resilient bodywith said curved portion.

ll. In a typewriting machine, in combination, a movable member, a fixed member, one of said members being provided with a curved surface, and a resilient body of greater length than said curved surface secured between one of said members and having a frictional connection with the other of said members, the point of frictional connection being without the extremity of said curved surface, said resilient body being adapted when the first mentioned member is'moved in the direction of said fixed memher to be progressively engaged with said curved surface.

12. In a typewriting machine, in combination, a movable member, a fixed'member, one o said members having a curved surface, and a flat spring interposed therebetween, said sp'ring being so arranged with respect a) said movable member and said fixe'd'member as to be progressively engaged with the curved surface of one of the same during a movement of said movable member toward 'said fixed member.

13. In a typewriting machine, in combination, a movable member, spring means adapted to return said member to normal position, a fixed stop, and a flat spring interosed there between and so arranged as to e gradually brought into contact with one oft 1e same during a movement of said movable member toward said fixed stop. 14.111 :1 typewriting machine, in combination, a movable member, a fixed member, one of said members being provided with a curved portion, and a flat spring interposed between said members, said flat spring being so arranged with respect to said members that during a movement of the former toward the latter said flat spring will be progressively engaged with said curved portion.

15. In a typewriting machine, in c0mbination, a movable member. a fixed member, one of said members being provided with a curved surface, a fiat spring so arranged with respect to said members that during a movement of the former toward the latter said flat spring will be brought gradually into contact with said curved surface, thereby reducing its effective length, said operation effecting a constantly increasing resist ance to the movement of said first-mentioned member.

16. In a typewritingmachine, in combination, a movable member, a fixed member, one of said members being provided with a curved surface, and a fiat spring secured to one of said members and having a frictional connection with the other of said members and so arranged with respect to said members that a movement of the former toward the latter will effect a progressive engagement of said flat spring about one of said members.

17 In a typewriting machine in combination, a movable member, a fixed member,

one of said members being provided with a curved portion, and a fiat spring of greater length than said curved portion attached to one of said members and having a'frictional connection with the other of said members and so arranged with respect to said members that a movement of the former toward the latter will efiect a progressive engagement of said spring about one of said members.

" 18. In a typewriting machine in combination, a movable member, a fixed member, one

of said parts being provided with a curved surface, and a flat spring fastened to one of said parts and engaging the other thereof adapted to be progressively engaged with said curved surface during a movement of the key lever toward said stop.

20. In a typewriting machine, in combination, a movable part, a return spring therefor, and means for silently arresting the movement of said part comprising a fixed part and a resilient body attached to one of said parts, said resilient body being so constructed with respect to said parts that the movement of the former toward the latter will effect a progressive engagement of said resilient body with one of said parts.

21. In a typewriting machine, in combination, a movable part and a fixed part, one of said parts having a curved surface and a flat spring secured at one end to one ofsaid parts adapted progressively to engage said curved surface as said movable part approaches said fixed part.

22. In a typewriting machine, in combina-. tion, a movable part, a finger key adapted to be operated upon to actuate said movable part, and a fixed part, one of said parts having a curved surface, and a flat spring .nected to a relatively fixed part of the machine and with said member adapted progressively to engage said curved surface when said member approaches the point of connection between said spring and the machine.

24. In a typewriting machine, in combination, a manually operating member through which the type are actuated, said member being provided with a curved surface, a flexible member having one end secured adjacent said curved surface and the other end portion operatively connected with the frame of the machine and spaced from said operating member, whereby said flexible member is alternately rolled upon and unrolled from said curved surface as the corresponding operating member is actuated.

25. In atypewriting machine, in combination, a manually operating member through which the type are actuated said member being provided with a curved surface, resilient means having one end secured adjacent said curved surface and the other end portion operatively connected withthe frame of the machine and spaced from said operating member, whereby said resilient means is alternately rolled upon and unrolled from said curved surface as the corresponding operating member is actuated.

26. In a typewriting machine, in combination, a manually operating member through which the type are actuated, said member being provided with a curved surface, a flexible member havin one end secured adj acent said curved sur ace and the other end portion operatively connected with the frame of the machine and spaced from said operating member, whereby said flexible member is alternately rolled upon and unrolled from said curved surface as the corresponding operating member is actuated, and a spring member pperatively connected withone of said parts adapted to return said manually operating member to normal position.

27. In a typewriting machine, in combination, a manually operated member through which the type are actuated, said member being provided with aicurved surface, a

.fiexible member having one end secured adjacent said curved surface and so positioned as to/alternately roll upon and unroll from said. curved surface as the ,corresponding operated member is actuated.

28. In a typewriting machine, in combination, a manually operated member through which the type are actuated, said member being provided with a curved surface a flexible member having one end secured adjacent said curved surface and so positioned as to alternately roll upon and unroll from said curved surface as the corresponding operated member is actuated, and spring means for returning said manually operated member to normal position.

In testimony whereof I aflix my signature, in the presence of two Witnesses.

WILLIAM A. LORENZ. WVitnesses J ANETTE S. ELLswoRTH, CAROLINE M. BRECKLE. 

